Question

Match the noble gases with their correct symbols
Noble gases: (a) Helium (b) Neon (c) Argon (d) Krypton (e) Xenon (f) Radon
Symbols: (1) Ar (2) Xe (3) Rn (4) He (5) Kr (6) Ne

Answer 1

Symbol is used to represent an atom. It is not convenient to write the complete name of an atom, so symbols are used to denote an atom. Generally, the initial latter of the name is used as a symbol.

Complete answer:
The atomic representation is as follows:
$_{\text{Z}}^{\text{A}}{\text{X}}$
${\text{X}}$ is the symbol of the atom.
${\text{Z}}$ is the atomic number of proton number.
${\text{A}}$ is the atomic mass.
A single capital letter that is the initial letter of the atomic name is used to represent the atom.
An atomic representation can have two letters if the first letter already represents some other atom. In that case, the first two letters are used to represent that atom. The second letter will be written as a small letter.
The name of all noble gases are as follows:
(a) Helium (b) Neon (c) Argon (d) Krypton (e) Xenon (f) Radon
So, the symbol of helium is He.
The symbol of neon is Ne.
The symbol of argon is Ar.
The symbol of krypton is Kr.
The symbol of xenon is Xe.
The symbol of radon is Rn.
So, the correct matching is,
(a) Helium-(4) He
(b) Neon-(6) Ne
(c) Argon-(1) Ar
(d) Krypton-(5) Kr
(e) Xenon-(2) Xe
(f) Radon- (3) Rn

Note:
A capital letter or a capital with a small letter represents the atom and is known as an atomic symbol. The molecule representation includes the letter that represents the atomic symbol of the atoms present in that molecule. The symbol of Radon should be ‘Ra’ but Ra symbol is used for radium, so radon is denoted as Rn. An atomic symbol can have a single capital letter but cannot have a single small letter. In atomic representation, the atomic number is the number of protons present in the nucleus of an atom. Every atom has a unique atomic number.